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102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
// Copyright (C) 2002 Brad King (brad.king@kitware.com)
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// Douglas Gregor (gregod@cs.rpi.edu)
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//
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// Copyright (C) 2002, 2008 Peter Dimov
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// For more information, see http://www.boost.org
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#ifndef BOOST_UTILITY_ADDRESSOF_HPP
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# define BOOST_UTILITY_ADDRESSOF_HPP
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# include <boost/config.hpp>
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# include <boost/detail/workaround.hpp>
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namespace boost
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{
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namespace detail
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{
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template<class T> struct addr_impl_ref
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{
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T & v_;
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inline addr_impl_ref( T & v ): v_( v ) {}
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inline operator T& () const { return v_; }
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private:
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addr_impl_ref & operator=(const addr_impl_ref &);
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};
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template<class T> struct addressof_impl
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{
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static inline T * f( T & v, long )
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{
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return reinterpret_cast<T*>(
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&const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
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}
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static inline T * f( T * v, int )
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{
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return v;
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}
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};
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} // namespace detail
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template<class T> T * addressof( T & v )
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{
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#if (defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x610 ) ) ) || defined( __SUNPRO_CC )
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return boost::detail::addressof_impl<T>::f( v, 0 );
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#else
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return boost::detail::addressof_impl<T>::f( boost::detail::addr_impl_ref<T>( v ), 0 );
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#endif
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}
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#if defined( __SUNPRO_CC ) && BOOST_WORKAROUND( __SUNPRO_CC, BOOST_TESTED_AT( 0x590 ) )
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namespace detail
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{
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template<class T> struct addressof_addp
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{
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typedef T * type;
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};
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} // namespace detail
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template< class T, std::size_t N >
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typename detail::addressof_addp< T[N] >::type addressof( T (&t)[N] )
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{
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return &t;
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}
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#endif
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// Borland doesn't like casting an array reference to a char reference
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// but these overloads work around the problem.
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#if defined( __BORLANDC__ ) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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template<typename T,std::size_t N>
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T (*addressof(T (&t)[N]))[N]
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{
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return reinterpret_cast<T(*)[N]>(&t);
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}
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template<typename T,std::size_t N>
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const T (*addressof(const T (&t)[N]))[N]
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{
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return reinterpret_cast<const T(*)[N]>(&t);
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}
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#endif
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} // namespace boost
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#endif // BOOST_UTILITY_ADDRESSOF_HPP
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